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E. M. HAMILTON.

TYPE WRITING MACHINE. No. 357,921. Patented Feb. 15, 188 7.

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UNITED STATES PATENT OFFICE.

EMERY M. HAMILTON, on NEW YORK, n. Y.

TYPE-WRITING MACHINE.

$PBCIPICATION forming part of Letters Patent No. 357,921, dated February 15, 1887.

Application filed December 6, 1886. Serial No. 220,847. (No motlell T0 aZZ whom it may concern/.-

Be it known that I, EMERY M. HAMILTON, of the city of New York, in the county and State of New York, and a citizen of the United States of America, have invented a new and useful Improvement in the Feed-Rollers of Type-\Vriting Machines, of which the following is a specification, reference being had to the accompanying drawings, forming part of the same, in which Figure 1 is an end elevation of my feed-rollers and the frame in which they are mounted. Fig. 2 is a plan of the same, and Fig. 3 is a plan of the said frame with one of the rollers removed and the other shown in longitudinal sect-ion.

My invention relates to feed-rollers that are specially adapted to feed the paper in typewriting machines, but may be useful in other oonn ections where a yielding pressure between the rollers is required; and it consists in the devices hereinafter described and claimed.

The frame in which the rolls are mounted, as adapted to atypewriting machine, consists of a plate, A, of sheet metal, preferably steel, provided at each end with a pillow-block, B B, in whichis journaled the roller 0, and in which the ends of the axial bar of the roller 0' have their bearings. The roller 0 is a hollow cylinder provided with heads ct a, through which are apertures of smaller diameter than the interior of the body of the, roller. This roller is placed on a rod or bar, I), also of smaller diameter than that of the interior of the roller 0, which passes through the roller, fitting loosely into the apertures in the heads a a, thus permitting the roller to revolve freely on said rod. The ends of said rod rest in slotted openings in the pillow blocks, (one of which is shown at b, Fig. 1,) which permit a movement of the said rod to and from the roller 0.

0 and c are set-screws fitted into screwthreaded apertures in the pillow-blocks B B,

" the inner ends of which abut against the side of the rod 1), near its ends. The rod 1), is of spring material, and the slotted holes b permit its ends to be forced by means of the setscrews 6 0 toward the roller 0, so as to press To this end the roller 0, as shown in the draw the rollers forcibly together, while the said ings, is made shorter than the roller 0, in or der to get the axial bearings of both of these rollers in the same pillow-blocks; but the roller 0 may extend in length to equal that of C, if desired, by chambering out the extended ends as the middle portion is chambered, leaving the bearings or the roller on the rod, where they are shown in the drawings, or at a suitable distance from the ends of the extended roller; or the roller 0 may be of equal length with the roller 0, and the rod 1) may be extended to and have its end bearings in separate supports outside of the pillow-blocks. The rod 0 may be retained in its desired position on the rod by collars, pins, or screws on or in the rod at the end of the cylinder, or in any other suitable manner. \Vith this con struction the entire strain of the spring is taken by the pillow-blocks or end supports of the rod I), thus permitting the rest of the frame to be made slender and light, the stress of the spring having no tendency to warp or bend the frame. This is a feature of considerable importance in typewriting machines where these feed-rollers and the frame in which they are mounted form a part of the carrier, which it is desirable to move with as little force as possible. Other advantages of my rollers and described connections are their extreme simplicity and cheapness, durability, and efficiency.

If preferred, the middle portion of the roller 0' may be cut away entirely, leaving two short rollers, a c of any suitable length of face and axial bearing.

VVhatIelaim as myinvention, and desire to adjust and press the rollers together with a secure by Letters Patent, is

The described feed-rollers, one of which is j ournaled to revolve in suitable bearings at its 5 ends and the other mounted to revolve upon a spring axial rod, the ends of which rest in slotted bearings provided with setsorews to spring-pressure, as and for the purpose speci fied.

EMERY M. HAMILTON. W'itnesses: v

A. S. FITCH, A. G. N. VERMILYA. 

